CN105221113A - A kind of Y tube anti-pollution tubing string based on solubility ball and anti-pollution production method - Google Patents
A kind of Y tube anti-pollution tubing string based on solubility ball and anti-pollution production method Download PDFInfo
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- CN105221113A CN105221113A CN201510604169.2A CN201510604169A CN105221113A CN 105221113 A CN105221113 A CN 105221113A CN 201510604169 A CN201510604169 A CN 201510604169A CN 105221113 A CN105221113 A CN 105221113A
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- pollution
- tubing string
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Abstract
The invention discloses a kind of Y tube anti-pollution tubing string based on solubility ball, comprise sleeve pipe, be arranged on the oil pipe in sleeve pipe, Y-shaped connector, Electric Submersible Pump Unit, produce blanking plug, pipe with holes, releasing tool, ball seat, solubility ball, landing nipple, tail pipe, insert sealing; The invention also discloses a kind of anti-pollution production method: first prepare above-mentioned tubing string and down in producing well, open described Electric Submersible Pump Unit and carry out oil well production; After production terminates, described in pulling, produce blanking plug, drop into solubility ball and carry out clean-out service; After clean-out service terminates, suppress to 7MPa, trip out tubing string by described casing annulus, described solubility ball and described ball seat are stayed down-hole and are played anti-pollution; Under enter upper tubing string, open described Electric Submersible Pump Unit and carry out oil well production.The present invention is simple and reliable, can shorten the activity duration and save operating cost, and solve hanging valve plate and can not open the intransitable problem of the testing tool caused completely.
Description
Technical field
The present invention relates to mechanical decontamination system, particularly a kind of oilfield Y tube anti-pollution tubing string based on solubility ball and anti-pollution production method.
Background technology
During oilfield clean-out service, go if formation fluid invades in stratum, can cause injury in various degree to oil reservoir, serious made oil well output declines, and current mechanical anti-pollution valve is one of antipollution conventional means of well-flushing.The mechanical anti-pollution valve being suitable for Y tubing string at present mainly contains flap valve and ball valve two kinds, wherein flap valve technique, tool construction is complicated and sometimes occur that valve plate can not open phenomenon completely, causes testing tool not enter down; Ball valve is complex structure not only, and can not play anti-pollution in well-flushing Well Killing Process repeatedly.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, the Y tube anti-pollution tubing string based on solubility ball providing a kind of structure simple, easy and simple to handle and anti-pollution production method.
In order to solve the problems of the technologies described above, the invention provides a kind of Y tube anti-pollution tubing string based on solubility ball, comprise sleeve pipe, be arranged on the oil pipe in sleeve upper end portion, described oil pipe upper end is equipped with Y-shaped connector, side, described Y-shaped connector lower end is connected with Electric Submersible Pump Unit, opposite side lower end is positioned at oil pipe and is provided with production blanking plug, described oil pipe end is connected with pipe with holes, described pipe lower end with holes is provided with releasing tool, described releasing tool lower end is connected with ball seat, the solubility ball fastened with it is provided with in described ball seat, described ball seat end is provided with the landing nipple that top packer is connected with sleeve pipe, described ball seat end is connected with tail pipe, screen casing is arranged with outside described tail pipe, be provided with to insert between described screen casing upper end and tail pipe upper end and seal, at least one packer is provided with between described screen casing and sleeve pipe.
Described ball seat is provided with step.
Described solubility ball is that the solid sphere of diameter 59.4mm is formed.
Described solubility ball is that almag is formed.
The present invention also provides a kind of and utilizes the above-mentioned Y tube anti-pollution tubing string based on solubility ball to carry out the method for anti-pollution production, comprises the following steps:
(1) the above-mentioned Y tube anti-pollution tubing string based on solubility ball is prepared, comprise sleeve pipe, be arranged on the oil pipe in sleeve upper end portion, described oil pipe upper end is equipped with Y-shaped connector, side, described Y-shaped connector lower end is connected with Electric Submersible Pump Unit, opposite side lower end is positioned at oil pipe and is provided with production blanking plug, described oil pipe end is connected with pipe with holes, described pipe lower end with holes is provided with releasing tool, described releasing tool lower end is connected with ball seat, the solubility ball fastened with it is provided with in described ball seat, described ball seat end is provided with the landing nipple that top packer is connected with sleeve pipe, described ball seat end is connected with tail pipe, screen casing is arranged with outside described tail pipe, be provided with to insert between described screen casing upper end and tail pipe upper end and seal, at least one packer is provided with between described screen casing and sleeve pipe,
(2) enter above-mentioned tubing string under in producing well, and open described Electric Submersible Pump Unit and carry out oil well production;
(3) after production terminates, described in pulling, produce blanking plug, drop into solubility ball and also inject flushing fluid, carry out clean-out service;
(4), after clean-out service terminates, described casing annulus is suppressed to 7MPa, trips out tubing string, and make described releasing tool tie-back sleeve, described solubility ball stays down-hole with described ball seat with lower tubular column, plays anti-pollution;
(5) enter upper tubing string under, make it dock with described releasing tool tie-back sleeve, open described Electric Submersible Pump Unit and carry out oil well production, described solubility ball departs from described ball seat under pressure differential effect, and dissolves completely along with described solubility ball is carried out in production;
(6), during acidifying, after producing blanking plug described in pulling, in oil pipe, directly inject acidifying medicament carry out acidifying.
The invention has the beneficial effects as follows:
1, the present invention connects under above tubing string and lower tubular column realize one-trip string by releasing tool, shortens the activity duration and saves operating cost;
2, the present invention is simple and reliable, drops into solubility ball during well-flushing, under separately, enter switching tools or other operations;
3, the present invention retains test channel, eliminates hanging valve plate and can not open the intransitable impact of the testing tool caused completely;
Directly acidizing treatment can be carried out after blanking plug is produced in pulling when 4, adopting the present invention to carry out acidifying.
Accompanying drawing explanation
Fig. 1: structural representation of the present invention;
Fig. 2: structural representation when the present invention normally produces;
Fig. 3: structural representation during well-flushing of the present invention;
Fig. 4: the present invention trips out structural representation after tubing string;
Fig. 5: structural representation during acidifying of the present invention.
Accompanying drawing marks: 1, Y-shaped connector; 2, Electric Submersible Pump Unit; 3, blanking plug is produced; 4, oil pipe; 5, pipe with holes; 6, releasing tool; 7, solubility ball; 8, ball seat; 9, landing nipple; 10, sealing is inserted; 11, top packer, 12, packer; 13, tail pipe; 14, screen casing; 15, sleeve pipe.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in accompanying drawing 1-5, a kind of Y tube anti-pollution tubing string based on solubility ball 7, comprise sleeve pipe 15, be arranged on the oil pipe 4 in sleeve pipe 15 upper end, described oil pipe 4 upper end is provided with Y-shaped connector 1, side, described Y-shaped connector 1 lower end is connected with Electric Submersible Pump Unit 2, opposite side lower end is positioned at oil pipe 4 and is provided with production blanking plug 3, described oil pipe 4 end is connected with pipe 5 with holes, described pipe with holes 5 lower end is provided with releasing tool 6, described releasing tool 6 lower end is connected with ball seat 8, described ball seat 8 is provided with step, the solubility ball 7 fastened with it is provided with in described ball seat 8, described solubility ball 7 is that the solid sphere of diameter 59.4mm is formed, and be almag formation, described ball seat 8 end is provided with the landing nipple 9 that top packer 11 is connected with sleeve pipe 15, described ball seat 8 end is connected with tail pipe 13, screen casing 14 is arranged with outside described tail pipe 13, be provided with between described screen casing 14 upper end and tail pipe 13 upper end and insert sealing 10, between described screen casing 14 and sleeve pipe 15, be provided with at least one packer 12.
The above-mentioned Y tube anti-pollution pipe based on solubility ball 7 is utilized to carry out anti-pollution production operation, comprise the following steps: during production operation, enter in producing well under after Y-shaped connector 1, Electric Submersible Pump Unit 2, production blanking plug 3, pipe with holes 5, releasing tool 6, ball seat 8, landing nipple 9, insertion sealing 10, tail pipe 13 are connected successively, open described Electric Submersible Pump Unit 2, fluid is through tail pipe 13, ball seat 8, pipe with holes 5, Electric Submersible Pump Unit 2, Y-shaped connector 1, oil pipe 4 carries out oil well production; When carrying out clean-out service after production terminates, produce blanking plug 3 described in pulling, drop into solubility ball 7, after described solubility ball 7 sets with described ball seat 8, flushing fluid injects through oil jacket annular space, enters described oil pipe 4 carry out clean-out service through described pipe 5 with holes; After clean-out service terminates, sleeve pipe 15 annular space is suppressed to 7MPa, described releasing tool 6 is slipped out of the hand with described releasing tool 6 tie-back sleeve, trip out tubing string, described releasing tool 6 tie-back sleeve, described solubility ball 7 stay down-hole with described ball seat 8 with lower tubular column, now, described solubility ball 7 still keeps setting with described ball seat 8, in whole washing well process, play anti-pollution; When again carrying out production operation, under enter upper tubing string, it is made to dock with described releasing tool 6 tie-back sleeve, open described Electric Submersible Pump Unit 2 and carry out oil well production, described solubility ball 7 departs from described ball seat 8 under pressure differential effect, thus do not affect normal production, dissolve completely along with described solubility ball 7 is carried out in production, thus do not affect test channel; During acidifying, directly can inject acidifying medicament in oil pipe 4 after producing blanking plug 3 described in pulling and carry out acidifying.
Claims (5)
1. the Y tube anti-pollution tubing string based on solubility ball, comprise sleeve pipe, be arranged on the oil pipe in sleeve upper end portion, described oil pipe upper end is equipped with Y-shaped connector, side, described Y-shaped connector lower end is connected with Electric Submersible Pump Unit, opposite side lower end is positioned at oil pipe and is provided with production blanking plug, described oil pipe end is connected with pipe with holes, it is characterized in that, described pipe lower end with holes is provided with releasing tool, described releasing tool lower end is connected with ball seat, the solubility ball fastened with it is provided with in described ball seat, described ball seat end is provided with the landing nipple that top packer is connected with sleeve pipe, described ball seat end is connected with tail pipe, screen casing is arranged with outside described tail pipe, be provided with to insert between described screen casing upper end and tail pipe upper end and seal, at least one packer is provided with between described screen casing and sleeve pipe.
2. the Y tube anti-pollution tubing string based on solubility ball according to claim 1, it is characterized in that, described ball seat is provided with step.
3. the Y tube anti-pollution tubing string based on solubility ball according to claim 1, is characterized in that, described solubility ball is that the solid sphere of diameter 59.4mm is formed.
4. the Y tube anti-pollution tubing string based on solubility ball according to claim 1 or 3, is characterized in that, described solubility ball is that almag is formed.
5. utilize the Y tube anti-pollution method based on solubility ball of claim 1, it is characterized in that, comprise the following steps:
(1) the Y tube anti-pollution tubing string based on solubility ball according to claim 1 is prepared, comprise sleeve pipe, be arranged on the oil pipe in sleeve upper end portion, described oil pipe upper end is equipped with Y-shaped connector, side, described Y-shaped connector lower end is connected with Electric Submersible Pump Unit, opposite side lower end is positioned at oil pipe and is provided with production blanking plug, described oil pipe end is connected with pipe with holes, described pipe lower end with holes is provided with releasing tool, described releasing tool lower end is connected with ball seat, the solubility ball fastened with it is provided with in described ball seat, described ball seat end is provided with the landing nipple that top packer is connected with sleeve pipe, described ball seat end is connected with tail pipe, screen casing is arranged with outside described tail pipe, be provided with to insert between described screen casing upper end and tail pipe upper end and seal, at least one packer is provided with between described screen casing and sleeve pipe,
(2) enter above-mentioned tubing string under in producing well, and open described Electric Submersible Pump Unit and carry out oil well production;
(3) after production terminates, described in pulling, produce blanking plug, drop into solubility ball and also inject flushing fluid, carry out clean-out service;
(4), after clean-out service terminates, described casing annulus is suppressed to 7MPa, trips out tubing string, and make described releasing tool tie-back sleeve, described solubility ball stays down-hole with described ball seat with lower tubular column, plays anti-pollution;
(5) enter upper tubing string under, make it dock with described releasing tool tie-back sleeve, open described Electric Submersible Pump Unit and carry out oil well production, described solubility ball departs from described ball seat under pressure differential effect, and dissolves completely along with described solubility ball is carried out in production;
(6), during acidifying, after producing blanking plug described in pulling, in oil pipe, directly inject acidifying medicament carry out acidifying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510604169.2A CN105221113A (en) | 2015-09-21 | 2015-09-21 | A kind of Y tube anti-pollution tubing string based on solubility ball and anti-pollution production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510604169.2A CN105221113A (en) | 2015-09-21 | 2015-09-21 | A kind of Y tube anti-pollution tubing string based on solubility ball and anti-pollution production method |
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| Publication Number | Publication Date |
|---|---|
| CN105221113A true CN105221113A (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510604169.2A Pending CN105221113A (en) | 2015-09-21 | 2015-09-21 | A kind of Y tube anti-pollution tubing string based on solubility ball and anti-pollution production method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2721869Y (en) * | 2004-08-23 | 2005-08-31 | 关仲 | Layer adjusting producing tubular column with multiple oil layer |
| CN101265788A (en) * | 2008-04-24 | 2008-09-17 | 中国海洋石油总公司 | Y tube anti-pollution method and its apparatus |
| CN101338658A (en) * | 2008-08-11 | 2009-01-07 | 中国海洋石油总公司 | Hermetic electric submersible pump production completion system capable of proceeding steel wire operation |
| CN201214986Y (en) * | 2007-12-07 | 2009-04-01 | 王杰林 | Anti-pollution well washing oil extraction device |
| US20110073316A1 (en) * | 2009-09-30 | 2011-03-31 | Schlumberger Technology Corporation | Surface refillable protector |
| CN104373101A (en) * | 2014-03-26 | 2015-02-25 | 中国石油集团渤海钻探工程有限公司 | Fracturing ball for oil-gas well fracturing process and preparation method thereof |
-
2015
- 2015-09-21 CN CN201510604169.2A patent/CN105221113A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2721869Y (en) * | 2004-08-23 | 2005-08-31 | 关仲 | Layer adjusting producing tubular column with multiple oil layer |
| CN201214986Y (en) * | 2007-12-07 | 2009-04-01 | 王杰林 | Anti-pollution well washing oil extraction device |
| CN101265788A (en) * | 2008-04-24 | 2008-09-17 | 中国海洋石油总公司 | Y tube anti-pollution method and its apparatus |
| CN101338658A (en) * | 2008-08-11 | 2009-01-07 | 中国海洋石油总公司 | Hermetic electric submersible pump production completion system capable of proceeding steel wire operation |
| US20110073316A1 (en) * | 2009-09-30 | 2011-03-31 | Schlumberger Technology Corporation | Surface refillable protector |
| CN104373101A (en) * | 2014-03-26 | 2015-02-25 | 中国石油集团渤海钻探工程有限公司 | Fracturing ball for oil-gas well fracturing process and preparation method thereof |
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Effective date of registration: 20170113 Address after: 100027 Beijing city Dongcheng District Dongzhimen Street No. 6 Applicant after: CNOOC Energy Technology Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant before: China National Offshore Oil Corporation Applicant before: CNOOC Energy Technology Co., Ltd. |
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Application publication date: 20160106 |